Highway 4 Corridor

Enhancing the critical east-west pathway with transportation options that join East County with Central County and the greater Bay Area.

Highway 4 Corridor Map
California Route 4 westbound sign near a highway with cars and hills in the background.

A VISION FOR HIGHWAY 4

Corridorwide

A study of transportation needs and solutions to identify and prioritize the next generation of mobility options and maximize efficiency of the corridor
A modern, small autonomous vehicle with glass windows parked near a glass building as two pedestrians walk by.

DYNAMIC PERSONAL MICROTRANSIT

East County

A multi-city, fully-automated, on-demand microtransit system to improve transit access by providing first mile/last mile connections
Wind turbines on a dry, grassy landscape under a clear blue sky.

STATE ROUTE 239

East County

The proposed roadway would improve travel within eastern Contra Costa and the town of Byron while creating a vital connection to Byron Airport and the Central Valley
Person in a wheelchair boarding a vehicle using an accessible ramp.

AUTONOMOUS SHUTTLE SERVICE

Martinez

On-demand, wheelchair accessible autonomous shuttles for people who need reliable transportation to medical appointments and hospital services in Martinez
Aerial view of a highway interchange with surrounding green landscape and multiple roads converging.

I-680/SR-4 INTERCHANGE IMPROVEMENTS

Martinez

Reconfigured ramps and ramp meters to improve operations, enhance safety, and reduce congestion at the interchange
A ferry departing from a terminal near a parking lot and a green park area with trees.

FERRY SERVICE EXPANSION

Martinez, Pittsburgh, and Antioch

A study focused on possible expansions of the ferry system between San Francisco and northern communities like Martinez, Pittsburg, and Antioch
A bike and pedestrian pathway surrounded by trees in a park, featuring a mini traffic roundabout, road signs, and a playground in the background.

ANTIOCH BICYCLE GARDEN

Antioch

A unique facility with a miniature city streetscape, providing opportunities for fun outdoor activities and a safe space to practice bike and pedestrian safety
Aerial view of highway construction work with multiple vehicles on the road and fields on either side.

MOKELUMNE TRAIL BICYCLE & PEDESTRIAN OVERCROSSING

Brentwood

A new bridge over Highway 4 to close a gap in the trail and provide safe access to cyclists and pedestrians for both recreation and commuting